Wins
22
Indexed tournament wins
Player record
Williamson, John
Losses
29
Indexed tournament losses
Matches
51
Decisive results
Win rate
43.1%
Across indexed matches
Peak rating
1,650
Highest rating in the available history.
Biggest upset
Zaverukha, Ilya
Middle Creek November Open · Nov 7, 2009 · +241 rating
Open →Biggest loss
Zook, Lester
Butterfly/East Gate Open Series · Jan 16, 2010 · -284 rating
Open →Most frequent opponent
Butts, Mike
2 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
6 tournament appearances · synced Aug 8, 2026, 2:17 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Mar 13, 2010 | Butterfly/East Gate Open SeriesTournament · View matches | 1,650 | 1,640 | -10+3 / -13 | 1W / 7L |
| Jan 16, 2010 | Butterfly/East Gate Open SeriesTournament · View matches | 1,644 | 1,650 | +6+16 / -10 | 7W / 2L |
| Nov 7, 2009 | Middle Creek November OpenTournament · View matches | 1,520 | 1,644 | +124 | 5W / 4L |
| Nov 10, 2007 | Butterfly East Gate TT Tour. STournament · View matches | 1,526 | 1,520 | -6+0 / -6 | 1W / 8L |
| Apr 29, 2006 | Virginia OpenTournament · View matches | 1,516 | 1,526 | +10+13 / -3 | 5W / 2L |
| Mar 12, 2005 | Virginia OpenTournament · View matches · Initial rating 1,516 | Unrated | 1,516 | — | 3W / 6L |
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